The best developer experience
for load testing

Open source load testing tool and SaaS
for engineering teams

Open Source >_Cloud >_

Cloud >_Open Source >_

Open Source

Easy-to-use and feature-rich load testing tool. Free to use on your infrastructure.

Cloud

A tailored SaaS service to scale your performance testing.

How It Works

Same script for local and cloud tests

Open Source

Built for teams

Developers

The k6 API and CLI are intuitive, powerful, and flexible.
Write realistic load tests in Javascript.

DevOps & SREs

Automate your tests to ensure that your infrastructure and application remain performant.
Host it yourself or leverage the cloud.

Software Testers & QAs

Create tests faster with our browser recorder and converters (JMeter, Postman, Swagger).
Extensive documentation, awesome community and first class support.

Powerful Scripting

No XML. No DSL. Just familiar scripting with ES6 JS

import http from 'k6/http';
import {check, sleep} from 'k6';

export default function() {
  const data = {username: 'username', password: 'password'};
  let res = http.post('https://myapi.com/login/', data);
    check(res, { 'success login': (r) => r.status === 200 });
    sleep(0.3);
}

Still stuck with JMeter?

GUI and Code-based testing.
Upgrade to a better developer experience.

Like Unit Testing for Performance >

What our users are saying

@k6_io I love you ❤️ this is the second time you helped us track down a nasty bug in @grafana that only happens under heavy load. Thank you for a great tool! Btw I've heard our offices are close by, we should definitely meet up sometime...

Marcus Efraimsson

@mefraimsson

Code-driven, JavaScript load tests that fit into our existing tool chain, clean APIs, command line so easy to automate and with a flag can run the same load test from the cloud in multiple locations. Haven’t had time to blog about it but k6 came out top of multiple tools tested

Ben Foster

@benfosterdev

Toying around with @k6_io tonight. Pretty impressed with how easy it is to set up (yay @Docker!) and to start building test scripts. Some early results: pic.twitter.com/LGCESvFMlv

Cees-Jan Kiewiet

@WyriHaximus

So @k6_io is probably my new favourite tool. Super quick to get set up and running load tests 😻

Morrison Cole

@morrisoncole

personally using @k6_io and its has helped us quite a lot already. Definitely worth adding to your testing pipeline.

Toyer M

@tottiLFC

Just discovered @k6_io very nice and simple tool for load testing

Erwan de FERRIERES

@erwandf

Lately I have been using @k6_io for performance testing the RESTful APIs we build and I simply fell in love with it. It so simple and easy to use, i highly recommend it!!

shradha khard

@ShradhaKhard

Loving @k6_io for integrating perf tests into @AzureDevOps pipelines. Great documentation, easy to use..

Vamsee Konda

@VamseeKonda

I've been tinkering with load testing recently and discovered @loadimpact. I'm absolutely loving it! I got up and running in minutes. Its UI is intuitive, and being based on JS makes it a breeze to start writing tests. That's not even mentioning the amazing open source k6! 😍

Chekote

@TheFuzzyCoder

The best developer experience
for load testing

Open Source